Scan an android to get 200 point discount on the final augmentation node [NO GBP] (#84502)

## About The Pull Request

Provides an alternative way to get the 200 points for the final
augmentation node.

Also reduced the tier of the prior tech node, it was put to tier 4 by
mistake

## Why It's Good For The Game

More options to get the desired node.

## Changelog

🆑
fix: Techweb: Moved upgraded cyber organs to tier 3 from tier 4
qol: Techweb: Added fully augmented android scan discount experiment for
Advanced Cybernetic Organs techweb node
/🆑

code/modules/research/techweb/nodes/cyborg_nodes.dm

@@ -19,6 +19,9 @@
 		"cybernetic_liver",
 		"cybernetic_heart",
 	)
+	experiments_to_unlock = list(
+		/datum/experiment/scanning/people/android,
+	)
 
 /datum/techweb_node/cybernetics
 	id = TECHWEB_NODE_CYBERNETICS
@@ -213,7 +216,7 @@
 		"cybernetic_liver_tier3",
 		"cybernetic_heart_tier3",
 	)
-	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = TECHWEB_TIER_4_POINTS)
+	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = TECHWEB_TIER_3_POINTS)
 	required_experiments = list(/datum/experiment/scanning/people/augmented_organs)
 
 /datum/techweb_node/cyber/cyber_organs_adv
@@ -229,3 +232,4 @@
 		"ci-xray-moth",
 	)
 	research_costs = list(TECHWEB_POINT_TYPE_GENERIC = TECHWEB_TIER_5_POINTS)
+	discount_experiments = list(/datum/experiment/scanning/people/android = TECHWEB_TIER_5_POINTS)